frappe.ui.form.on('Purchase Order', {

	setup(frm){
        // 取物料主数据设置的单位
           frm.set_query("uom", "items", function (doc, cdt, cdn) {
           let row = locals[cdt][cdn];
           return {
                 query:
                   "erpnext.accounts.doctype.pricing_rule.pricing_rule.get_item_uoms",
                 filters: {
                   value: row.item_code,
                   apply_on: "Item Code",
                           },
                 };
           });
           },

})